<template>
    <el-main class="image-main" v-loading="loading">
        <div class="top p-3">
            <el-row :gutter="10">
                <el-col :span="6" :offset="0" v-for="(item, index) in list" :key="index">
                    <el-card shadow="hover" class="relative mb-3" :body-style="{ 'padding': 0 }"
                        :class="{ 'border-blue-500': item.checked }">
                        <el-image :src="item.url" fit="cover" class="w-full h-[150px]" style="width: 100%;"
                            :preview-src-list="[item.url]" :initial-index="0"></el-image>
                        <div class="image-title">{{ item.name }}</div>
                        <div class="flex items-center justify-center p-2">

                            <!-- 编辑图片名称和选择图片 -->
                            <el-checkbox v-if="openChoose" v-model="item.checked" @change="handleChooseChange(item)" />

                            <el-button type="primary" size="small" text @click="handleEdit(item)">重命名</el-button>
                            <el-popconfirm title="是否要删除该图片？" confirm-button-text="确认" cancel-button-text="取消"
                                @confirm="handleDelete(item.id)">
                                <template #reference>
                                    <el-button class="!m-0" type="primary" size="small" text>删除</el-button>
                                </template>
                            </el-popconfirm>
                        </div>
                    </el-card>
                </el-col>
            </el-row>
        </div>

        <div class="bottom">
            <el-pagination background layout="prev,pager,next" :total="total" :current-page="currentPage"
                :page-size="limit" @current-change="getData" />
        </div>
    </el-main>

    <el-drawer v-model="drawer" title="上传图片">
        <UploadFile :data="{ image_class_id }" @success="handleUploadSuccess" />
    </el-drawer>
</template>

<script setup>
import { ref, computed } from 'vue'
import UploadFile from './UploadFile.vue'

import {
    showPrompt,
    toast
} from '~/composables/util.js'

import {
    getImageList,
    updateImage,
    daleteImage
} from '~/api/image.js'

// 上传数据
const drawer = ref(false)  //抽屉状态
const openUploadFile = () => {
    drawer.value = true
}

// 分页
const currentPage = ref(1)  //当前页码
const total = ref(0)  //总条数 
const limit = ref(10)  //每页显示条数
const list = ref([])  //数据列表
const loading = ref(false)  //加载状态
const image_class_id = ref(0)  //图片分类ID


// 获取数据
function getData(p = null) {
    if (typeof p == 'number') {
        currentPage.value = p
    }

    loading.value = true
    getImageList(image_class_id.value, currentPage.value)
        .then(res => {
            total.value = res.totalCount
            list.value = res.list.map(o => {
                o.checked = false
                return o
            })
        })
        .finally(() => {
            loading.value = false
        })
}

// 根据分类ID重新加载图片列表
const loadData = (id) => {
    currentPage.value = 1
    image_class_id.value = id
    getData()
}

// 重命名
const handleEdit = (item) => {
    showPrompt('重命名', item.name)
        .then(({ value }) => {
            loading.value = true
            updateImage(item.id, value)
                .then(res => {
                    toast("修改成功")
                    getData()
                })
                .finally(() => {
                    loading.value = false
                });
        })
}

// 删除图片
const handleDelete = (id) => {
    loading.value = true;
    daleteImage([id])
        .then(res => {
            toast("删除成功")
            getData();
        })
        .finally(() => {
            loading.value = false
        });
}

// 上传成功
const handleUploadSuccess = () => {
    getData(1)
}

// 选择的图片
const props = defineProps({
    // 是否可以选中图片
    openChoose: {
        type: Boolean,
        default: false
    },
    // 最多选择数量
    limit: {
        type: Number,
        default: 1
    }
})

// 选择的图片
const emit = defineEmits(["choose"])
const checkedImage = computed(() => list.value.filter(o => o.checked))
const handleChooseChange = (item) => {
    if (item.checked && checkedImage.value.length > props.limit) {
        item.checked = false
        return toast(`最多只能选中${props.limit}张`, "error")
    }
    emit("choose", checkedImage.value)
}

defineExpose({
    loadData,
    openUploadFile
})
</script>


<style scoped>
.image-main {
    position: relative
}

.image-main .top {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    bottom: 50px;
    overflow-y: auto;
}

.image-main .bottom {
    @apply flex items-center justify-center;
    position: absolute;
    bottom: 0;
    height: 50px;
    left: 0;
    right: 0;
}

.image-title {
    position: absolute;
    top: 122px;
    left: -1px;
    right: -1px;
    @apply text-sm truncate text-gray-100 bg-opacity-50 bg-gray-800 px-2 py-1;
}
</style>